codegen/valadbusmodule.vala

   1 /* valadbusmodule.vala
   2  *
   3  * Copyright (C) 2008-2010  Jürg Billeter
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  18  *
  19  * Author:
  20  *      Jürg Billeter <j@bitron.ch>
  21  */
  22
  23 public class Vala.DBusModule : GAsyncModule {
  24         struct BasicTypeInfo {
  25                 public weak string signature;
  26                 public weak string type_name;
  27                 public weak string cname;
  28                 public weak string gtype;
  29                 public weak string? get_value_function;
  30                 public weak string set_value_function;
  31         }
  32
  33         const BasicTypeInfo[] basic_types = {
  34                 { "y", "BYTE", "guint8", "G_TYPE_UCHAR", "g_value_get_uchar", "g_value_set_uchar" },
  35                 { "b", "BOOLEAN", "dbus_bool_t", "G_TYPE_BOOLEAN", "g_value_get_boolean", "g_value_set_boolean" },
  36                 { "n", "INT16", "dbus_int16_t", "G_TYPE_INT", null, "g_value_set_int" },
  37                 { "q", "UINT16", "dbus_uint16_t", "G_TYPE_UINT", null, "g_value_set_uint" },
  38                 { "i", "INT32", "dbus_int32_t", "G_TYPE_INT", "g_value_get_int", "g_value_set_int" },
  39                 { "u", "UINT32", "dbus_uint32_t", "G_TYPE_UINT", "g_value_get_uint", "g_value_set_uint" },
  40                 { "x", "INT64", "dbus_int64_t", "G_TYPE_INT64", "g_value_get_int64", "g_value_set_int64" },
  41                 { "t", "UINT64", "dbus_uint64_t", "G_TYPE_UINT64", "g_value_get_uint64", "g_value_set_uint64" },
  42                 { "d", "DOUBLE", "double", "G_TYPE_DOUBLE", "g_value_get_double", "g_value_set_double" },
  43                 { "s", "STRING", "const char*", "G_TYPE_STRING", "g_value_get_string", "g_value_take_string" },
  44                 { "o", "OBJECT_PATH", "const char*", "G_TYPE_STRING", null, "g_value_take_string" },
  45                 { "g", "SIGNATURE", "const char*", "G_TYPE_STRING", null, "g_value_take_string" }
  46         };
  47
  48         static bool is_string_marshalled_enum (TypeSymbol? symbol) {
  49                 if (symbol != null && symbol is Enum) {
  50                         var dbus = symbol.get_attribute ("DBus");
  51                         return dbus != null && dbus.get_bool ("use_string_marshalling");
  52                 }
  53                 return false;
  54         }
  55
  56         string get_dbus_value (EnumValue value, string default_value) {
  57                         var dbus = value.get_attribute ("DBus");
  58                         if (dbus == null) {
  59                                 return default_value;
  60                         }
  61
  62                         string dbus_value = dbus.get_string ("value");
  63                         if (dbus_value == null) {
  64                                 return default_value;
  65                         }
  66                         return dbus_value;
  67         }
  68
  69         public static string? get_dbus_name (TypeSymbol symbol) {
  70                 var dbus = symbol.get_attribute ("DBus");
  71                 if (dbus == null) {
  72                         return null;
  73                 }
  74
  75                 return dbus.get_string ("name");
  76         }
  77
  78         public static string get_dbus_name_for_member (Symbol symbol) {
  79                 var dbus = symbol.get_attribute ("DBus");
  80                 if (dbus != null && dbus.has_argument ("name")) {
  81                         return dbus.get_string ("name");
  82                 }
  83
  84                 return Symbol.lower_case_to_camel_case (symbol.name);
  85         }
  86
  87         bool get_basic_type_info (string signature, out BasicTypeInfo basic_type) {
  88                 foreach (BasicTypeInfo info in basic_types) {
  89                         if (info.signature == signature) {
  90                                 basic_type = info;
  91                                 return true;
  92                         }
  93                 }
  94                 return false;
  95         }
  96
  97         public static string? get_type_signature (DataType datatype) {
  98                 var array_type = datatype as ArrayType;
  99
 100                 if (array_type != null) {
 101                         string element_type_signature = get_type_signature (array_type.element_type);
 102
 103                         if (element_type_signature == null) {
 104                                 return null;
 105                         }
 106
 107                         return string.nfill (array_type.rank, 'a') + element_type_signature;
 108                 } else if (is_string_marshalled_enum (datatype.data_type)) {
 109                         return "s";
 110                 } else if (datatype.data_type != null) {
 111                         string sig = null;
 112
 113                         var ccode = datatype.data_type.get_attribute ("CCode");
 114                         if (ccode != null) {
 115                                 sig = ccode.get_string ("type_signature");
 116                         }
 117
 118                         var st = datatype.data_type as Struct;
 119                         var en = datatype.data_type as Enum;
 120                         if (sig == null && st != null) {
 121                                 var str = new StringBuilder ();
 122                                 str.append_c ('(');
 123                                 foreach (Field f in st.get_fields ()) {
 124                                         if (f.binding == MemberBinding.INSTANCE) {
 125                                                 str.append (get_type_signature (f.variable_type));
 126                                         }
 127                                 }
 128                                 str.append_c (')');
 129                                 sig = str.str;
 130                         } else if (sig == null && en != null) {
 131                                 if (en.is_flags) {
 132                                         return "u";
 133                                 } else {
 134                                         return "i";
 135                                 }
 136                         }
 137
 138                         var type_args = datatype.get_type_arguments ();
 139                         if (sig != null && "%s" in sig && type_args.size > 0) {
 140                                 string element_sig = "";
 141                                 foreach (DataType type_arg in type_args) {
 142                                         var s = get_type_signature (type_arg);
 143                                         if (s != null) {
 144                                                 element_sig += s;
 145                                         }
 146                                 }
 147
 148                                 sig = sig.printf (element_sig);
 149                         }
 150
 151                         return sig;
 152                 } else {
 153                         return null;
 154                 }
 155         }
 156
 157         public override void visit_enum (Enum en) {
 158                 base.visit_enum (en);
 159
 160                 if (is_string_marshalled_enum (en)) {
 161                         // strcmp
 162                         cfile.add_include ("string.h");
 163                         cfile.add_include ("dbus/dbus-glib.h");
 164
 165                         cfile.add_function (generate_enum_from_string_function (en));
 166                         cfile.add_function (generate_enum_to_string_function (en));
 167                 }
 168         }
 169
 170         public override bool generate_enum_declaration (Enum en, CCodeFile decl_space) {
 171                 if (base.generate_enum_declaration (en, decl_space)) {
 172                         if (is_string_marshalled_enum (en)) {
 173                                 decl_space.add_function_declaration (generate_enum_from_string_function_declaration (en));
 174                                 decl_space.add_function_declaration (generate_enum_to_string_function_declaration (en));
 175                         }
 176                         return true;
 177                 }
 178                 return false;
 179         }
 180
 181         CCodeExpression? get_array_length (CCodeExpression expr, int dim) {
 182                 var id = expr as CCodeIdentifier;
 183                 var ma = expr as CCodeMemberAccess;
 184                 if (id != null) {
 185                         return new CCodeIdentifier ("%s_length%d".printf (id.name, dim));
 186                 } else if (ma != null) {
 187                         if (ma.is_pointer) {
 188                                 return new CCodeMemberAccess.pointer (ma.inner, "%s_length%d".printf (ma.member_name, dim));
 189                         } else {
 190                                 return new CCodeMemberAccess (ma.inner, "%s_length%d".printf (ma.member_name, dim));
 191                         }
 192                 } else {
 193                         // must be NULL-terminated
 194                         var len_call = new CCodeFunctionCall (new CCodeIdentifier ("g_strv_length"));
 195                         len_call.add_argument (expr);
 196                         return len_call;
 197                 }
 198         }
 199
 200         CCodeExpression? generate_enum_value_from_string (CCodeFragment fragment, EnumValueType type, CCodeExpression? expr) {
 201                 var en = type.type_symbol as Enum;
 202                 var from_string_name = "%s_from_string".printf (en.get_lower_case_cname (null));
 203
 204                 var from_string_call = new CCodeFunctionCall (new CCodeIdentifier (from_string_name));
 205                 from_string_call.add_argument (expr);
 206                 from_string_call.add_argument (new CCodeConstant ("NULL"));
 207
 208                 return from_string_call;
 209         }
 210
 211         public CCodeFunction generate_enum_from_string_function_declaration (Enum en) {
 212                 var from_string_name = "%s_from_string".printf (en.get_lower_case_cname (null));
 213
 214                 var from_string_func = new CCodeFunction (from_string_name, en.get_cname ());
 215                 from_string_func.add_parameter (new CCodeParameter ("str", "const char*"));
 216                 from_string_func.add_parameter (new CCodeParameter ("error", "GError**"));
 217
 218                 return from_string_func;
 219         }
 220
 221         public CCodeFunction generate_enum_from_string_function (Enum en) {
 222                 var from_string_name = "%s_from_string".printf (en.get_lower_case_cname (null));
 223
 224                 var from_string_func = new CCodeFunction (from_string_name, en.get_cname ());
 225                 from_string_func.add_parameter (new CCodeParameter ("str", "const char*"));
 226                 from_string_func.add_parameter (new CCodeParameter ("error", "GError**"));
 227
 228                 var from_string_block = new CCodeBlock ();
 229                 from_string_func.block = from_string_block;
 230
 231                 var cdecl = new CCodeDeclaration (en.get_cname ());
 232                 cdecl.add_declarator (new CCodeVariableDeclarator.zero ("value", new CCodeConstant ("0")));
 233                 from_string_block.add_statement (cdecl);
 234
 235                 CCodeStatement if_else_if = null;
 236                 CCodeIfStatement last_statement = null;
 237                 foreach (EnumValue enum_value in en.get_values ()) {
 238                         var true_block = new CCodeBlock ();
 239                         true_block.suppress_newline = true;
 240                         true_block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("value"), new CCodeIdentifier (enum_value.get_cname ()))));
 241
 242                         string dbus_value = get_dbus_value (enum_value, enum_value.name);
 243                         var string_comparison = new CCodeFunctionCall (new CCodeIdentifier ("strcmp"));
 244                         string_comparison.add_argument (new CCodeIdentifier ("str"));
 245                         string_comparison.add_argument (new CCodeConstant ("\"%s\"".printf (dbus_value)));
 246                         var stmt = new CCodeIfStatement (new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, string_comparison, new CCodeConstant ("0")), true_block);
 247
 248                         if (last_statement != null) {
 249                                 last_statement.false_statement = stmt;
 250                         } else {
 251                                 if_else_if = stmt;
 252                         }
 253                         last_statement = stmt;
 254                 }
 255
 256                 var error_block = new CCodeBlock ();
 257                 error_block.suppress_newline = true;
 258
 259                 var set_error_call = new CCodeFunctionCall (new CCodeIdentifier ("g_set_error"));
 260                 set_error_call.add_argument (new CCodeIdentifier ("error"));
 261                 set_error_call.add_argument (new CCodeIdentifier ("DBUS_GERROR"));
 262                 set_error_call.add_argument (new CCodeIdentifier ("DBUS_GERROR_INVALID_ARGS"));
 263                 set_error_call.add_argument (new CCodeConstant ("\"%s\""));
 264                 set_error_call.add_argument (new CCodeConstant ("\"Invalid enumeration value\""));
 265                 error_block.add_statement (new CCodeExpressionStatement (set_error_call));
 266
 267                 last_statement.false_statement = error_block;
 268                 from_string_block.add_statement (if_else_if);
 269
 270                 from_string_block.add_statement (new CCodeReturnStatement (new CCodeIdentifier ("value")));
 271
 272                 return from_string_func;
 273         }
 274
 275         CCodeExpression read_basic (CCodeFragment fragment, BasicTypeInfo basic_type, CCodeExpression iter_expr, bool transfer = false) {
 276                 string temp_name = "_tmp%d_".printf (next_temp_var_id++);
 277
 278                 var cdecl = new CCodeDeclaration (basic_type.cname);
 279                 cdecl.add_declarator (new CCodeVariableDeclarator (temp_name));
 280                 fragment.append (cdecl);
 281
 282                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_get_basic"));
 283                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 284                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (temp_name)));
 285                 fragment.append (new CCodeExpressionStatement (iter_call));
 286
 287                 var temp_result = new CCodeIdentifier (temp_name);
 288
 289                 if (!transfer
 290                     && (basic_type.signature == "s"
 291                         || basic_type.signature == "o"
 292                         || basic_type.signature == "g")) {
 293                         var dup_call = new CCodeFunctionCall (new CCodeIdentifier ("g_strdup"));
 294                         dup_call.add_argument (temp_result);
 295                         return dup_call;
 296                 } else {
 297                         return temp_result;
 298                 }
 299         }
 300
 301         CCodeExpression read_array (CCodeFragment fragment, ArrayType array_type, CCodeExpression iter_expr, CCodeExpression? expr) {
 302                 string temp_name = "_tmp%d_".printf (next_temp_var_id++);
 303
 304                 var new_call = new CCodeFunctionCall (new CCodeIdentifier ("g_new"));
 305                 new_call.add_argument (new CCodeIdentifier (array_type.element_type.get_cname ()));
 306                 // add one extra element for NULL-termination
 307                 new_call.add_argument (new CCodeConstant ("5"));
 308
 309                 var cdecl = new CCodeDeclaration (array_type.get_cname ());
 310                 cdecl.add_declarator (new CCodeVariableDeclarator (temp_name, new_call));
 311                 fragment.append (cdecl);
 312
 313                 cdecl = new CCodeDeclaration ("int");
 314                 cdecl.add_declarator (new CCodeVariableDeclarator (temp_name + "_length", new CCodeConstant ("0")));
 315                 fragment.append (cdecl);
 316
 317                 cdecl = new CCodeDeclaration ("int");
 318                 cdecl.add_declarator (new CCodeVariableDeclarator (temp_name + "_size", new CCodeConstant ("4")));
 319                 fragment.append (cdecl);
 320
 321                 read_array_dim (fragment, array_type, 1, temp_name, iter_expr, expr);
 322
 323                 if (array_type.element_type.is_reference_type_or_type_parameter ()) {
 324                         // NULL terminate array
 325                         var length = new CCodeIdentifier (temp_name + "_length");
 326                         var element_access = new CCodeElementAccess (new CCodeIdentifier (temp_name), length);
 327                         fragment.append (new CCodeExpressionStatement (new CCodeAssignment (element_access, new CCodeIdentifier ("NULL"))));
 328                 }
 329
 330                 return new CCodeIdentifier (temp_name);
 331         }
 332
 333         void read_array_dim (CCodeFragment fragment, ArrayType array_type, int dim, string temp_name, CCodeExpression iter_expr, CCodeExpression? expr) {
 334                 string subiter_name = "_tmp%d_".printf (next_temp_var_id++);
 335
 336                 var cdecl = new CCodeDeclaration ("int");
 337                 cdecl.add_declarator (new CCodeVariableDeclarator ("%s_length%d".printf (temp_name, dim), new CCodeConstant ("0")));
 338                 fragment.append (cdecl);
 339
 340                 cdecl = new CCodeDeclaration ("DBusMessageIter");
 341                 cdecl.add_declarator (new CCodeVariableDeclarator (subiter_name));
 342                 fragment.append (cdecl);
 343
 344                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_recurse"));
 345                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 346                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 347                 fragment.append (new CCodeExpressionStatement (iter_call));
 348
 349                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_get_arg_type"));
 350                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 351
 352                 var cforblock = new CCodeBlock ();
 353                 var cforfragment = new CCodeFragment ();
 354                 cforblock.add_statement (cforfragment);
 355                 var cfor = new CCodeForStatement (iter_call, cforblock);
 356                 cfor.add_iterator (new CCodeUnaryExpression (CCodeUnaryOperator.POSTFIX_INCREMENT, new CCodeIdentifier ("%s_length%d".printf (temp_name, dim))));
 357
 358                 if (dim < array_type.rank) {
 359                         read_array_dim (cforfragment, array_type, dim + 1, temp_name, new CCodeIdentifier (subiter_name), expr);
 360
 361                         iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_next"));
 362                         iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 363                         cforfragment.append (new CCodeExpressionStatement (iter_call));
 364                 } else {
 365                         var size_check = new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, new CCodeIdentifier (temp_name + "_size"), new CCodeIdentifier (temp_name + "_length"));
 366                         var renew_block = new CCodeBlock ();
 367
 368                         // tmp_size = (2 * tmp_size);
 369                         var new_size = new CCodeBinaryExpression (CCodeBinaryOperator.MUL, new CCodeConstant ("2"), new CCodeIdentifier (temp_name + "_size"));
 370                         renew_block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier (temp_name + "_size"), new_size)));
 371
 372                         var renew_call = new CCodeFunctionCall (new CCodeIdentifier ("g_renew"));
 373                         renew_call.add_argument (new CCodeIdentifier (array_type.element_type.get_cname ()));
 374                         renew_call.add_argument (new CCodeIdentifier (temp_name));
 375                         // add one extra element for NULL-termination
 376                         renew_call.add_argument (new CCodeBinaryExpression (CCodeBinaryOperator.PLUS, new CCodeIdentifier (temp_name + "_size"), new CCodeConstant ("1")));
 377                         var renew_stmt = new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier (temp_name), renew_call));
 378                         renew_block.add_statement (renew_stmt);
 379
 380                         var cif = new CCodeIfStatement (size_check, renew_block);
 381                         cforfragment.append (cif);
 382
 383                         var element_access = new CCodeElementAccess (new CCodeIdentifier (temp_name), new CCodeUnaryExpression (CCodeUnaryOperator.POSTFIX_INCREMENT, new CCodeIdentifier (temp_name + "_length")));
 384                         var element_expr = read_expression (cforfragment, array_type.element_type, new CCodeIdentifier (subiter_name), null);
 385                         cforfragment.append (new CCodeExpressionStatement (new CCodeAssignment (element_access, element_expr)));
 386                 }
 387
 388                 fragment.append (cfor);
 389
 390                 if (expr != null) {
 391                         fragment.append (new CCodeExpressionStatement (new CCodeAssignment (get_array_length (expr, dim), new CCodeIdentifier ("%s_length%d".printf (temp_name, dim)))));
 392                 }
 393         }
 394
 395         CCodeExpression read_struct (CCodeFragment fragment, Struct st, CCodeExpression iter_expr) {
 396                 string temp_name = "_tmp%d_".printf (next_temp_var_id++);
 397                 string subiter_name = "_tmp%d_".printf (next_temp_var_id++);
 398
 399                 var cdecl = new CCodeDeclaration (st.get_cname ());
 400                 cdecl.add_declarator (new CCodeVariableDeclarator (temp_name));
 401                 fragment.append (cdecl);
 402
 403                 cdecl = new CCodeDeclaration ("DBusMessageIter");
 404                 cdecl.add_declarator (new CCodeVariableDeclarator (subiter_name));
 405                 fragment.append (cdecl);
 406
 407                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_recurse"));
 408                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 409                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 410                 fragment.append (new CCodeExpressionStatement (iter_call));
 411
 412                 foreach (Field f in st.get_fields ()) {
 413                         if (f.binding != MemberBinding.INSTANCE) {
 414                                 continue;
 415                         }
 416
 417                         var field_expr = read_expression (fragment, f.variable_type, new CCodeIdentifier (subiter_name), new CCodeMemberAccess (new CCodeIdentifier (temp_name), f.get_cname ()));
 418                         fragment.append (new CCodeExpressionStatement (new CCodeAssignment (new CCodeMemberAccess (new CCodeIdentifier (temp_name), f.get_cname ()), field_expr)));
 419                 }
 420
 421                 return new CCodeIdentifier (temp_name);
 422         }
 423
 424         CCodeExpression read_value (CCodeFragment fragment, CCodeExpression iter_expr) {
 425                 string temp_name = "_tmp%d_".printf (next_temp_var_id++);
 426                 string subiter_name = "_tmp%d_".printf (next_temp_var_id++);
 427
 428                 // 0-initialize struct with struct initializer { 0 }
 429                 var cvalinit = new CCodeInitializerList ();
 430                 cvalinit.append (new CCodeConstant ("0"));
 431
 432                 var cdecl = new CCodeDeclaration ("GValue");
 433                 cdecl.add_declarator (new CCodeVariableDeclarator.zero (temp_name, cvalinit));
 434                 fragment.append (cdecl);
 435
 436                 cdecl = new CCodeDeclaration ("DBusMessageIter");
 437                 cdecl.add_declarator (new CCodeVariableDeclarator (subiter_name));
 438                 fragment.append (cdecl);
 439
 440                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_recurse"));
 441                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 442                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 443                 fragment.append (new CCodeExpressionStatement (iter_call));
 444
 445                 CCodeIfStatement clastif = null;
 446
 447                 foreach (BasicTypeInfo basic_type in basic_types) {
 448                         var type_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_get_arg_type"));
 449                         type_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 450                         var type_check = new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, type_call, new CCodeIdentifier ("DBUS_TYPE_" + basic_type.type_name));
 451
 452                         var type_block = new CCodeBlock ();
 453                         var type_fragment = new CCodeFragment ();
 454                         type_block.add_statement (type_fragment);
 455                         var result = read_basic (type_fragment, basic_type, new CCodeIdentifier (subiter_name));
 456
 457                         var value_init = new CCodeFunctionCall (new CCodeIdentifier ("g_value_init"));
 458                         value_init.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (temp_name)));
 459                         value_init.add_argument (new CCodeIdentifier (basic_type.gtype));
 460                         type_fragment.append (new CCodeExpressionStatement (value_init));
 461
 462                         var value_set = new CCodeFunctionCall (new CCodeIdentifier (basic_type.set_value_function));
 463                         value_set.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (temp_name)));
 464                         value_set.add_argument (result);
 465                         type_fragment.append (new CCodeExpressionStatement (value_set));
 466
 467                         var cif = new CCodeIfStatement (type_check, type_block);
 468                         if (clastif == null) {
 469                                 fragment.append (cif);
 470                         } else {
 471                                 clastif.false_statement = cif;
 472                         }
 473
 474                         clastif = cif;
 475                 }
 476
 477                 // handle string arrays
 478                 var type_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_get_arg_type"));
 479                 type_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 480                 var type_check = new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, type_call, new CCodeIdentifier ("DBUS_TYPE_ARRAY"));
 481
 482                 type_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_get_element_type"));
 483                 type_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 484                 var element_type_check = new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, type_call, new CCodeIdentifier ("DBUS_TYPE_STRING"));
 485
 486                 type_check = new CCodeBinaryExpression (CCodeBinaryOperator.AND, type_check, element_type_check);
 487
 488                 var type_block = new CCodeBlock ();
 489                 var type_fragment = new CCodeFragment ();
 490                 type_block.add_statement (type_fragment);
 491                 var result = read_array (type_fragment, new ArrayType (string_type, 1, null), new CCodeIdentifier (subiter_name), null);
 492
 493                 var value_init = new CCodeFunctionCall (new CCodeIdentifier ("g_value_init"));
 494                 value_init.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (temp_name)));
 495                 value_init.add_argument (new CCodeIdentifier ("G_TYPE_STRV"));
 496                 type_fragment.append (new CCodeExpressionStatement (value_init));
 497
 498                 var value_set = new CCodeFunctionCall (new CCodeIdentifier ("g_value_take_boxed"));
 499                 value_set.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (temp_name)));
 500                 value_set.add_argument (result);
 501                 type_fragment.append (new CCodeExpressionStatement (value_set));
 502
 503                 var cif = new CCodeIfStatement (type_check, type_block);
 504                 if (clastif == null) {
 505                         fragment.append (cif);
 506                 } else {
 507                         clastif.false_statement = cif;
 508                 }
 509
 510                 clastif = cif;
 511
 512                 return new CCodeIdentifier (temp_name);
 513         }
 514
 515         CCodeExpression read_hash_table (CCodeFragment fragment, ObjectType type, CCodeExpression iter_expr) {
 516                 string temp_name = "_tmp%d_".printf (next_temp_var_id++);
 517                 string subiter_name = "_tmp%d_".printf (next_temp_var_id++);
 518                 string entryiter_name = "_tmp%d_".printf (next_temp_var_id++);
 519
 520                 var type_args = type.get_type_arguments ();
 521                 assert (type_args.size == 2);
 522                 var key_type = type_args.get (0);
 523                 var value_type = type_args.get (1);
 524
 525                 var cdecl = new CCodeDeclaration ("GHashTable*");
 526                 cdecl.add_declarator (new CCodeVariableDeclarator (temp_name));
 527                 fragment.append (cdecl);
 528
 529                 cdecl = new CCodeDeclaration ("DBusMessageIter");
 530                 cdecl.add_declarator (new CCodeVariableDeclarator (subiter_name));
 531                 fragment.append (cdecl);
 532
 533                 cdecl = new CCodeDeclaration ("DBusMessageIter");
 534                 cdecl.add_declarator (new CCodeVariableDeclarator (entryiter_name));
 535                 fragment.append (cdecl);
 536
 537                 var hash_table_new = new CCodeFunctionCall (new CCodeIdentifier ("g_hash_table_new_full"));
 538                 if (key_type.data_type == string_type.data_type) {
 539                         hash_table_new.add_argument (new CCodeIdentifier ("g_str_hash"));
 540                         hash_table_new.add_argument (new CCodeIdentifier ("g_str_equal"));
 541                 } else {
 542                         hash_table_new.add_argument (new CCodeIdentifier ("g_direct_hash"));
 543                         hash_table_new.add_argument (new CCodeIdentifier ("g_direct_equal"));
 544                 }
 545                 if (key_type.data_type == string_type.data_type) {
 546                         hash_table_new.add_argument (new CCodeIdentifier ("g_free"));
 547                 } else {
 548                         hash_table_new.add_argument (new CCodeIdentifier ("NULL"));
 549                 }
 550                 if (value_type.data_type == string_type.data_type) {
 551                         hash_table_new.add_argument (new CCodeIdentifier ("g_free"));
 552                 } else {
 553                         hash_table_new.add_argument (new CCodeIdentifier ("NULL"));
 554                 }
 555                 fragment.append (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier (temp_name), hash_table_new)));
 556
 557                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_recurse"));
 558                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 559                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 560                 fragment.append (new CCodeExpressionStatement (iter_call));
 561
 562                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_get_arg_type"));
 563                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 564
 565                 var cwhileblock = new CCodeBlock ();
 566                 var cwhilefragment = new CCodeFragment ();
 567                 cwhileblock.add_statement (cwhilefragment);
 568                 var cwhile = new CCodeWhileStatement (iter_call, cwhileblock);
 569
 570                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_recurse"));
 571                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 572                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (entryiter_name)));
 573                 cwhilefragment.append (new CCodeExpressionStatement (iter_call));
 574
 575                 cdecl = new CCodeDeclaration (key_type.get_cname ());
 576                 cdecl.add_declarator (new CCodeVariableDeclarator ("_key"));
 577                 cwhilefragment.append (cdecl);
 578
 579                 cdecl = new CCodeDeclaration (value_type.get_cname ());
 580                 cdecl.add_declarator (new CCodeVariableDeclarator ("_value"));
 581                 cwhilefragment.append (cdecl);
 582
 583                 var key_expr = read_expression (cwhilefragment, key_type, new CCodeIdentifier (entryiter_name), null);
 584                 cwhilefragment.append (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("_key"), key_expr)));
 585
 586                 var value_expr = read_expression (cwhilefragment, value_type, new CCodeIdentifier (entryiter_name), null);
 587                 cwhilefragment.append (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("_value"), value_expr)));
 588
 589                 var hash_table_insert = new CCodeFunctionCall (new CCodeIdentifier ("g_hash_table_insert"));
 590                 hash_table_insert.add_argument (new CCodeIdentifier (temp_name));
 591                 hash_table_insert.add_argument (convert_to_generic_pointer (new CCodeIdentifier ("_key"), key_type));
 592                 hash_table_insert.add_argument (convert_to_generic_pointer (new CCodeIdentifier ("_value"), value_type));
 593                 cwhilefragment.append (new CCodeExpressionStatement (hash_table_insert));
 594
 595                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_next"));
 596                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 597                 cwhilefragment.append (new CCodeExpressionStatement (iter_call));
 598
 599                 fragment.append (cwhile);
 600
 601                 return new CCodeIdentifier (temp_name);
 602         }
 603
 604         public CCodeExpression? read_expression (CCodeFragment fragment, DataType type, CCodeExpression iter_expr, CCodeExpression? expr) {
 605                 BasicTypeInfo basic_type;
 606                 CCodeExpression result = null;
 607                 if (is_string_marshalled_enum (type.data_type)) {
 608                         get_basic_type_info ("s", out basic_type);
 609                         result = read_basic (fragment, basic_type, iter_expr, true);
 610                         result = generate_enum_value_from_string (fragment, type as EnumValueType, result);
 611                 } else if (get_basic_type_info (get_type_signature (type), out basic_type)) {
 612                         result = read_basic (fragment, basic_type, iter_expr);
 613                 } else if (type is ArrayType) {
 614                         result = read_array (fragment, (ArrayType) type, iter_expr, expr);
 615                 } else if (type.data_type is Struct) {
 616                         var st = (Struct) type.data_type;
 617                         if (type.data_type.get_full_name () == "GLib.Value") {
 618                                 result = read_value (fragment, iter_expr);
 619                         } else {
 620                                 result = read_struct (fragment, st, iter_expr);
 621                         }
 622                         if (type.nullable) {
 623                                 var csizeof = new CCodeFunctionCall (new CCodeIdentifier ("sizeof"));
 624                                 csizeof.add_argument (new CCodeIdentifier (st.get_cname ()));
 625                                 var cdup = new CCodeFunctionCall (new CCodeIdentifier ("g_memdup"));
 626                                 cdup.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, result));
 627                                 cdup.add_argument (csizeof);
 628                                 result = cdup;
 629                         }
 630                 } else if (type is ObjectType) {
 631                         if (type.data_type.get_full_name () == "GLib.HashTable") {
 632                                 result = read_hash_table (fragment, (ObjectType) type, iter_expr);
 633                         }
 634                 } else {
 635                         Report.error (type.source_reference, "D-Bus deserialization of type `%s' is not supported".printf (type.to_string ()));
 636                         return null;
 637                 }
 638
 639                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_next"));
 640                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 641                 fragment.append (new CCodeExpressionStatement (iter_call));
 642
 643                 return result;
 644         }
 645
 646         CCodeExpression? generate_enum_value_to_string (CCodeFragment fragment, EnumValueType type, CCodeExpression? expr) {
 647                 var en = type.type_symbol as Enum;
 648                 var to_string_name = "%s_to_string".printf (en.get_lower_case_cname (null));
 649
 650                 var to_string_call = new CCodeFunctionCall (new CCodeIdentifier (to_string_name));
 651                 to_string_call.add_argument (expr);
 652
 653                 return to_string_call;
 654         }
 655
 656         public CCodeFunction generate_enum_to_string_function_declaration (Enum en) {
 657                 var to_string_name = "%s_to_string".printf (en.get_lower_case_cname (null));
 658
 659                 var to_string_func = new CCodeFunction (to_string_name, "const char*");
 660                 to_string_func.add_parameter (new CCodeParameter ("value", en.get_cname ()));
 661
 662                 return to_string_func;
 663         }
 664
 665         public CCodeFunction generate_enum_to_string_function (Enum en) {
 666                 var to_string_name = "%s_to_string".printf (en.get_lower_case_cname (null));
 667
 668                 var to_string_func = new CCodeFunction (to_string_name, "const char*");
 669                 to_string_func.add_parameter (new CCodeParameter ("value", en.get_cname ()));
 670
 671                 var to_string_block = new CCodeBlock ();
 672                 to_string_func.block = to_string_block;
 673
 674                 var cdecl = new CCodeDeclaration ("const char *");
 675                 cdecl.add_declarator (new CCodeVariableDeclarator ("str"));
 676                 to_string_block.add_statement (cdecl);
 677
 678                 var cswitch = new CCodeSwitchStatement (new CCodeIdentifier ("value"));
 679                 foreach (EnumValue enum_value in en.get_values ()) {
 680                         string dbus_value = get_dbus_value (enum_value, enum_value.name);
 681                         cswitch.add_statement (new CCodeCaseStatement (new CCodeIdentifier (enum_value.get_cname ())));
 682                         cswitch.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("str"), new CCodeConstant ("\"%s\"".printf (dbus_value)))));
 683                         cswitch.add_statement (new CCodeBreakStatement ());
 684                 }
 685                 to_string_block.add_statement (cswitch);
 686
 687                 to_string_block.add_statement (new CCodeReturnStatement (new CCodeIdentifier ("str")));
 688
 689                 return to_string_func;
 690         }
 691
 692         void write_basic (CCodeFragment fragment, BasicTypeInfo basic_type, CCodeExpression iter_expr, CCodeExpression expr) {
 693                 string temp_name = "_tmp%d_".printf (next_temp_var_id++);
 694
 695                 var cdecl = new CCodeDeclaration (basic_type.cname);
 696                 cdecl.add_declarator (new CCodeVariableDeclarator (temp_name));
 697                 fragment.append (cdecl);
 698
 699                 fragment.append (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier (temp_name), expr)));
 700
 701                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_append_basic"));
 702                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 703                 iter_call.add_argument (new CCodeIdentifier ("DBUS_TYPE_" + basic_type.type_name));
 704                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (temp_name)));
 705                 fragment.append (new CCodeExpressionStatement (iter_call));
 706         }
 707
 708         void write_array (CCodeFragment fragment, ArrayType array_type, CCodeExpression iter_expr, CCodeExpression array_expr) {
 709                 string array_iter_name = "_tmp%d_".printf (next_temp_var_id++);
 710
 711                 var cdecl = new CCodeDeclaration (array_type.get_cname ());
 712                 cdecl.add_declarator (new CCodeVariableDeclarator (array_iter_name));
 713                 fragment.append (cdecl);
 714
 715                 fragment.append (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier (array_iter_name), array_expr)));
 716
 717                 write_array_dim (fragment, array_type, 1, iter_expr, array_expr, new CCodeIdentifier (array_iter_name));
 718         }
 719
 720         void write_array_dim (CCodeFragment fragment, ArrayType array_type, int dim, CCodeExpression iter_expr, CCodeExpression array_expr, CCodeExpression array_iter_expr) {
 721                 string subiter_name = "_tmp%d_".printf (next_temp_var_id++);
 722                 string index_name = "_tmp%d_".printf (next_temp_var_id++);
 723
 724                 var cdecl = new CCodeDeclaration ("DBusMessageIter");
 725                 cdecl.add_declarator (new CCodeVariableDeclarator (subiter_name));
 726                 fragment.append (cdecl);
 727
 728                 cdecl = new CCodeDeclaration ("int");
 729                 cdecl.add_declarator (new CCodeVariableDeclarator (index_name));
 730                 fragment.append (cdecl);
 731
 732                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_open_container"));
 733                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 734                 iter_call.add_argument (new CCodeIdentifier ("DBUS_TYPE_ARRAY"));
 735                 iter_call.add_argument (new CCodeConstant ("\"%s%s\"".printf (string.nfill (array_type.rank - dim, 'a'), get_type_signature (array_type.element_type))));
 736                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 737                 fragment.append (new CCodeExpressionStatement (iter_call));
 738
 739                 var cforblock = new CCodeBlock ();
 740                 var cforfragment = new CCodeFragment ();
 741                 cforblock.add_statement (cforfragment);
 742                 var cfor = new CCodeForStatement (new CCodeBinaryExpression (CCodeBinaryOperator.LESS_THAN, new CCodeIdentifier (index_name), get_array_length (array_expr, dim)), cforblock);
 743                 cfor.add_initializer (new CCodeAssignment (new CCodeIdentifier (index_name), new CCodeConstant ("0")));
 744                 cfor.add_iterator (new CCodeUnaryExpression (CCodeUnaryOperator.POSTFIX_INCREMENT, new CCodeIdentifier (index_name)));
 745
 746                 if (dim < array_type.rank) {
 747                         write_array_dim (cforfragment, array_type, dim + 1, new CCodeIdentifier (subiter_name), array_expr, array_iter_expr);
 748                 } else {
 749                         var element_expr = new CCodeUnaryExpression (CCodeUnaryOperator.POINTER_INDIRECTION, array_iter_expr);
 750                         write_expression (cforfragment, array_type.element_type, new CCodeIdentifier (subiter_name), element_expr);
 751
 752                         var array_iter_incr = new CCodeUnaryExpression (CCodeUnaryOperator.POSTFIX_INCREMENT, array_iter_expr);
 753                         cforfragment.append (new CCodeExpressionStatement (array_iter_incr));
 754                 }
 755                 fragment.append (cfor);
 756
 757                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_close_container"));
 758                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 759                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 760                 fragment.append (new CCodeExpressionStatement (iter_call));
 761         }
 762
 763         void write_struct (CCodeFragment fragment, Struct st, CCodeExpression iter_expr, CCodeExpression struct_expr) {
 764                 string subiter_name = "_tmp%d_".printf (next_temp_var_id++);
 765
 766                 var cdecl = new CCodeDeclaration ("DBusMessageIter");
 767                 cdecl.add_declarator (new CCodeVariableDeclarator (subiter_name));
 768                 fragment.append (cdecl);
 769
 770                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_open_container"));
 771                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 772                 iter_call.add_argument (new CCodeIdentifier ("DBUS_TYPE_STRUCT"));
 773                 iter_call.add_argument (new CCodeConstant ("NULL"));
 774                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 775                 fragment.append (new CCodeExpressionStatement (iter_call));
 776
 777                 foreach (Field f in st.get_fields ()) {
 778                         if (f.binding != MemberBinding.INSTANCE) {
 779                                 continue;
 780                         }
 781
 782                         write_expression (fragment, f.variable_type, new CCodeIdentifier (subiter_name), new CCodeMemberAccess (struct_expr, f.get_cname ()));
 783                 }
 784
 785                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_close_container"));
 786                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 787                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 788                 fragment.append (new CCodeExpressionStatement (iter_call));
 789         }
 790
 791         void write_value (CCodeFragment fragment, CCodeExpression iter_expr, CCodeExpression expr) {
 792                 string subiter_name = "_tmp%d_".printf (next_temp_var_id++);
 793
 794                 var cdecl = new CCodeDeclaration ("DBusMessageIter");
 795                 cdecl.add_declarator (new CCodeVariableDeclarator (subiter_name));
 796                 fragment.append (cdecl);
 797
 798                 CCodeIfStatement clastif = null;
 799
 800                 foreach (BasicTypeInfo basic_type in basic_types) {
 801                         // ensure that there is only one case per GType
 802                         if (basic_type.get_value_function == null) {
 803                                 continue;
 804                         }
 805
 806                         var type_call = new CCodeFunctionCall (new CCodeIdentifier ("G_VALUE_TYPE"));
 807                         type_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, expr));
 808                         var type_check = new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, type_call, new CCodeIdentifier (basic_type.gtype));
 809
 810                         var type_block = new CCodeBlock ();
 811                         var type_fragment = new CCodeFragment ();
 812                         type_block.add_statement (type_fragment);
 813
 814                         var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_open_container"));
 815                         iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 816                         iter_call.add_argument (new CCodeIdentifier ("DBUS_TYPE_VARIANT"));
 817                         iter_call.add_argument (new CCodeConstant ("\"%s\"".printf (basic_type.signature)));
 818                         iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 819                         type_fragment.append (new CCodeExpressionStatement (iter_call));
 820
 821                         var value_get = new CCodeFunctionCall (new CCodeIdentifier (basic_type.get_value_function));
 822                         value_get.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, expr));
 823
 824                         write_basic (type_fragment, basic_type, new CCodeIdentifier (subiter_name), value_get);
 825
 826                         iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_close_container"));
 827                         iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 828                         iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 829                         type_fragment.append (new CCodeExpressionStatement (iter_call));
 830
 831                         var cif = new CCodeIfStatement (type_check, type_block);
 832                         if (clastif == null) {
 833                                 fragment.append (cif);
 834                         } else {
 835                                 clastif.false_statement = cif;
 836                         }
 837
 838                         clastif = cif;
 839                 }
 840
 841                 // handle string arrays
 842                 var type_call = new CCodeFunctionCall (new CCodeIdentifier ("G_VALUE_TYPE"));
 843                 type_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, expr));
 844                 var type_check = new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, type_call, new CCodeIdentifier ("G_TYPE_STRV"));
 845
 846                 var type_block = new CCodeBlock ();
 847                 var type_fragment = new CCodeFragment ();
 848                 type_block.add_statement (type_fragment);
 849
 850                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_open_container"));
 851                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 852                 iter_call.add_argument (new CCodeIdentifier ("DBUS_TYPE_VARIANT"));
 853                 iter_call.add_argument (new CCodeConstant ("\"as\""));
 854                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 855                 type_fragment.append (new CCodeExpressionStatement (iter_call));
 856
 857                 var value_get = new CCodeFunctionCall (new CCodeIdentifier ("g_value_get_boxed"));
 858                 value_get.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, expr));
 859
 860                 write_array (type_fragment, new ArrayType (string_type, 1, null), new CCodeIdentifier (subiter_name), value_get);
 861
 862                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_close_container"));
 863                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 864                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 865                 type_fragment.append (new CCodeExpressionStatement (iter_call));
 866
 867                 var cif = new CCodeIfStatement (type_check, type_block);
 868                 if (clastif == null) {
 869                         fragment.append (cif);
 870                 } else {
 871                         clastif.false_statement = cif;
 872                 }
 873
 874                 clastif = cif;
 875         }
 876
 877         void write_hash_table (CCodeFragment fragment, ObjectType type, CCodeExpression iter_expr, CCodeExpression hash_table_expr) {
 878                 string subiter_name = "_tmp%d_".printf (next_temp_var_id++);
 879                 string entryiter_name = "_tmp%d_".printf (next_temp_var_id++);
 880                 string tableiter_name = "_tmp%d_".printf (next_temp_var_id++);
 881                 string key_name = "_tmp%d_".printf (next_temp_var_id++);
 882                 string value_name = "_tmp%d_".printf (next_temp_var_id++);
 883
 884                 var type_args = type.get_type_arguments ();
 885                 assert (type_args.size == 2);
 886                 var key_type = type_args.get (0);
 887                 var value_type = type_args.get (1);
 888
 889                 var iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_open_container"));
 890                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 891                 iter_call.add_argument (new CCodeIdentifier ("DBUS_TYPE_ARRAY"));
 892                 iter_call.add_argument (new CCodeConstant ("\"{%s%s}\"".printf (get_type_signature (key_type), get_type_signature (value_type))));
 893                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 894                 fragment.append (new CCodeExpressionStatement (iter_call));
 895
 896                 var cdecl = new CCodeDeclaration ("DBusMessageIter");
 897                 cdecl.add_declarator (new CCodeVariableDeclarator (subiter_name));
 898                 cdecl.add_declarator (new CCodeVariableDeclarator (entryiter_name));
 899                 fragment.append (cdecl);
 900
 901                 cdecl = new CCodeDeclaration ("GHashTableIter");
 902                 cdecl.add_declarator (new CCodeVariableDeclarator (tableiter_name));
 903                 fragment.append (cdecl);
 904
 905                 cdecl = new CCodeDeclaration ("gpointer");
 906                 cdecl.add_declarator (new CCodeVariableDeclarator (key_name));
 907                 cdecl.add_declarator (new CCodeVariableDeclarator (value_name));
 908                 fragment.append (cdecl);
 909
 910                 var iter_init_call = new CCodeFunctionCall (new CCodeIdentifier ("g_hash_table_iter_init"));
 911                 iter_init_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (tableiter_name)));
 912                 iter_init_call.add_argument (hash_table_expr);
 913                 fragment.append (new CCodeExpressionStatement (iter_init_call));
 914
 915                 var iter_next_call = new CCodeFunctionCall (new CCodeIdentifier ("g_hash_table_iter_next"));
 916                 iter_next_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (tableiter_name)));
 917                 iter_next_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (key_name)));
 918                 iter_next_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (value_name)));
 919
 920                 var cwhileblock = new CCodeBlock ();
 921                 var cwhilefragment = new CCodeFragment ();
 922                 cwhileblock.add_statement (cwhilefragment);
 923                 var cwhile = new CCodeWhileStatement (iter_next_call, cwhileblock);
 924
 925                 cdecl = new CCodeDeclaration (key_type.get_cname ());
 926                 cdecl.add_declarator (new CCodeVariableDeclarator ("_key"));
 927                 cwhilefragment.append (cdecl);
 928
 929                 cdecl = new CCodeDeclaration (value_type.get_cname ());
 930                 cdecl.add_declarator (new CCodeVariableDeclarator ("_value"));
 931                 cwhilefragment.append (cdecl);
 932
 933                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_open_container"));
 934                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 935                 iter_call.add_argument (new CCodeIdentifier ("DBUS_TYPE_DICT_ENTRY"));
 936                 iter_call.add_argument (new CCodeConstant ("NULL"));
 937                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (entryiter_name)));
 938                 cwhilefragment.append (new CCodeExpressionStatement (iter_call));
 939
 940                 cwhilefragment.append (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("_key"), convert_from_generic_pointer (new CCodeIdentifier (key_name), key_type))));
 941                 cwhilefragment.append (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("_value"), convert_from_generic_pointer (new CCodeIdentifier (value_name), value_type))));
 942
 943                 write_expression (cwhilefragment, key_type, new CCodeIdentifier (entryiter_name), new CCodeIdentifier ("_key"));
 944                 write_expression (cwhilefragment, value_type, new CCodeIdentifier (entryiter_name), new CCodeIdentifier ("_value"));
 945
 946                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_close_container"));
 947                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 948                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (entryiter_name)));
 949                 cwhilefragment.append (new CCodeExpressionStatement (iter_call));
 950
 951                 fragment.append (cwhile);
 952
 953                 iter_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_message_iter_close_container"));
 954                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, iter_expr));
 955                 iter_call.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeIdentifier (subiter_name)));
 956                 fragment.append (new CCodeExpressionStatement (iter_call));
 957         }
 958
 959         public void write_expression (CCodeFragment fragment, DataType type, CCodeExpression iter_expr, CCodeExpression expr) {
 960                 BasicTypeInfo basic_type;
 961                 if (is_string_marshalled_enum (type.data_type)) {
 962                         get_basic_type_info ("s", out basic_type);
 963                         var result = generate_enum_value_to_string (fragment, type as EnumValueType, expr);
 964                         write_basic (fragment, basic_type, iter_expr, result);
 965                 } else if (get_basic_type_info (get_type_signature (type), out basic_type)) {
 966                         write_basic (fragment, basic_type, iter_expr, expr);
 967                 } else if (type is ArrayType) {
 968                         write_array (fragment, (ArrayType) type, iter_expr, expr);
 969                 } else if (type.data_type is Struct) {
 970                         var st_expr = expr;
 971                         if (type.nullable) {
 972                                 st_expr = new CCodeUnaryExpression (CCodeUnaryOperator.POINTER_INDIRECTION, st_expr);
 973                         }
 974                         if (type.data_type.get_full_name () == "GLib.Value") {
 975                                 write_value (fragment, iter_expr, st_expr);
 976                         } else {
 977                                 write_struct (fragment, (Struct) type.data_type, iter_expr, st_expr);
 978                         }
 979                 } else if (type is ObjectType) {
 980                         if (type.data_type.get_full_name () == "GLib.HashTable") {
 981                                 write_hash_table (fragment, (ObjectType) type, iter_expr, expr);
 982                         }
 983                 } else {
 984                         Report.error (type.source_reference, "D-Bus serialization of type `%s' is not supported".printf (type.to_string ()));
 985                 }
 986         }
 987
 988         public void add_dbus_helpers () {
 989                 if (cfile.add_declaration ("_vala_dbus_register_object")) {
 990                         return;
 991                 }
 992
 993                 cfile.add_include ("dbus/dbus.h");
 994                 cfile.add_include ("dbus/dbus-glib.h");
 995                 cfile.add_include ("dbus/dbus-glib-lowlevel.h");
 996
 997                 var dbusvtable = new CCodeStruct ("_DBusObjectVTable");
 998                 dbusvtable.add_field ("void", "(*register_object) (DBusConnection*, const char*, void*)");
 999                 cfile.add_type_definition (dbusvtable);
1000
1001                 cfile.add_type_declaration (new CCodeTypeDefinition ("struct _DBusObjectVTable", new CCodeVariableDeclarator ("_DBusObjectVTable")));
1002
1003                 var cfunc = new CCodeFunction ("_vala_dbus_register_object", "void");
1004                 cfunc.add_parameter (new CCodeParameter ("connection", "DBusConnection*"));
1005                 cfunc.add_parameter (new CCodeParameter ("path", "const char*"));
1006                 cfunc.add_parameter (new CCodeParameter ("object", "void*"));
1007
1008                 cfunc.modifiers |= CCodeModifiers.STATIC;
1009                 cfile.add_function_declaration (cfunc);
1010
1011                 var block = new CCodeBlock ();
1012                 cfunc.block = block;
1013
1014                 var cdecl = new CCodeDeclaration ("const _DBusObjectVTable *");
1015                 cdecl.add_declarator (new CCodeVariableDeclarator ("vtable"));
1016                 block.add_statement (cdecl);
1017
1018                 var quark = new CCodeFunctionCall (new CCodeIdentifier ("g_quark_from_static_string"));
1019                 quark.add_argument (new CCodeConstant ("\"DBusObjectVTable\""));
1020
1021                 var get_qdata = new CCodeFunctionCall (new CCodeIdentifier ("g_type_get_qdata"));
1022                 get_qdata.add_argument (new CCodeIdentifier ("G_TYPE_FROM_INSTANCE (object)"));
1023                 get_qdata.add_argument (quark);
1024
1025                 block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("vtable"), get_qdata)));
1026
1027                 var cregister = new CCodeFunctionCall (new CCodeMemberAccess.pointer (new CCodeIdentifier ("vtable"), "register_object"));
1028                 cregister.add_argument (new CCodeIdentifier ("connection"));
1029                 cregister.add_argument (new CCodeIdentifier ("path"));
1030                 cregister.add_argument (new CCodeIdentifier ("object"));
1031
1032                 var ifblock = new CCodeBlock ();
1033                 ifblock.add_statement (new CCodeExpressionStatement (cregister));
1034
1035                 var elseblock = new CCodeBlock ();
1036
1037                 var warn = new CCodeFunctionCall (new CCodeIdentifier ("g_warning"));
1038                 warn.add_argument (new CCodeConstant ("\"Object does not implement any D-Bus interface\""));
1039
1040                 elseblock.add_statement (new CCodeExpressionStatement(warn));
1041
1042                 block.add_statement (new CCodeIfStatement (new CCodeIdentifier ("vtable"), ifblock, elseblock));
1043
1044                 cfile.add_function (cfunc);
1045
1046                 // unregister function
1047                 cfunc = new CCodeFunction ("_vala_dbus_unregister_object", "void");
1048                 cfunc.add_parameter (new CCodeParameter ("connection", "gpointer"));
1049                 cfunc.add_parameter (new CCodeParameter ("object", "GObject*"));
1050
1051                 cfunc.modifiers |= CCodeModifiers.STATIC;
1052                 cfile.add_function_declaration (cfunc);
1053
1054                 block = new CCodeBlock ();
1055                 cfunc.block = block;
1056
1057                 cdecl = new CCodeDeclaration ("char*");
1058                 cdecl.add_declarator (new CCodeVariableDeclarator ("path"));
1059                 block.add_statement (cdecl);
1060
1061                 var path = new CCodeFunctionCall (new CCodeIdentifier ("g_object_steal_data"));
1062                 path.add_argument (new CCodeCastExpression (new CCodeIdentifier ("object"), "GObject*"));
1063                 path.add_argument (new CCodeConstant ("\"dbus_object_path\""));
1064                 block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("path"), path)));
1065
1066                 var unregister_call = new CCodeFunctionCall (new CCodeIdentifier ("dbus_connection_unregister_object_path"));
1067                 unregister_call.add_argument (new CCodeIdentifier ("connection"));
1068                 unregister_call.add_argument (new CCodeIdentifier ("path"));
1069                 block.add_statement (new CCodeExpressionStatement (unregister_call));
1070
1071                 var path_free = new CCodeFunctionCall (new CCodeIdentifier ("g_free"));
1072                 path_free.add_argument (new CCodeIdentifier ("path"));
1073                 block.add_statement (new CCodeExpressionStatement (path_free));
1074
1075                 cfile.add_function (cfunc);
1076         }
1077 }